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2013.09.14

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<div style="margin-left: 4em">Your
Jobber Wish-List - by Allan Janssen 03/01/2007 
 
<img src="images/clip.jpg" border="0" alt="article3"> <img src=
"images/clip3.jpg" border="0" alt="Canadian_Technician">
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OCTOBER 2005 
 
<img src="images/clip2.jpg" border="0" alt="article4"> <img src=
"images/clip3.jpg" border="0" alt="Canadian_Technician">
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From: 
Matt & Donna 
Matt's Automotive 
296 Killaly Street West, 
Port Colborne, Ontario, 
L3K6A6, Canada. 
Tel: 905-835-0064 
Fax:905-834-5885 
<a href="http://mattsauto.dyndns.org">mattsauto</a>
  Tire
Trouble
  It was a normal day
in our sleepy town. "Maw" and I were just finishing our morning
brew, when the Catera rolled into our shop parking lot. Morning
John, We both greeted him. Nice day isn't it, no snow, sun's out.
What more could we want in December. John grumbled back yeah. I got
a weird problem here. It's the wife's car and she's madder than a
hatter with "Betsy" out there. She was driving down the highway and
tried to pass the smelly recycling truck she was following. As she
accelerated to pass, at about 120+ kph Betsy started to loose power
leaving my wife on the wrong side of the highway with on-coming
traffic. Slithering back-in behind the truck, she came home, sparks
flying in all directions, mainly at me!! John said that his
mechanics had taken a look at the car, hooked-up their scanner and
found nothing wrong. You are good at nailing problems...it's all
yours. You got to help on this one, or I'll be in the "dog house"
for Christmas! And so he left the car with us. I took the car out
on a drive test after he had gone. Just as he told me, at around
120+kph it felt like I was towing that Recycling truck behind me. I
checked some of the scanner readings, nothing unusual, except at
about 2900rpm the engine started delivering less fuel than it
should. It felt to me like a traction control system problem. I
pulled over, got out and inspected the tires and I noticed
different sizes on the front and back. Hmmm...we are getting
closer, I said...Switching my scanner into ABS/TRACTION system
diagnostic mode, I proceeded down the road. At over 100+kph it
showed speed difference between front and rear tires. The front
tires were spinning slower than the rear tires. SEE (no
problem.gif).
<img src="images/no_problem.gif"
alt="no_problem">
I continued to accelerate until at
approx 124kph the power loss problem showed-up. The engine started
reducing torque output SEE (problem.gif).
<img src="images/problem.gif" alt=
"problem">
I drove back to the shop and
phoned John. John, did you recently buy new rubber for Betsy? Yes,
came the replay. You see my wife is one of those hard to buy for
sorts. I presented her with 2 new tires for her Birthday. Great
gift, isn't it. Why do you ask??? That's your problem. There are
two different tire sizes - front VS back! Your car is rear wheel
drive and the car's traction control senses the difference (rear
spinning faster than the front) and thinks that the car is starting
to loose traction at the rear drive wheels and reduces engine
torque output by injecting less fuel in order to see the tires slow
down...Dead silence at the other end of the phone. John, you still
there? I heard a low groan, yeah I'm here. I tried to save some $$$
on cheaper similar close fit tires from Xxx-Mart. Not a word to my
wife about this. I'll take it from here - thanks...
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